Pulsed blowdown-electron gun facility for low-temperature and high-pressure supersonic flow electronic transition lasers
Abstract
The design of a small compact pulsed blowdown apparatus coupled to a cold cathode electron gun is described. This system allows the excitation of a gas mixture in supersonic flow at temperatures of 80 and 120 K and density of 1 amagat with a maximum electron beam current density of 20 A cm-2 at 300 kV and pulse length of 0.5 μs. With this facility it has been possible, using aerodynamic cooling, to achieve high-power, long-pulse ultraviolet laser operation in a high-pressure active medium on XeF and Ne ii ion transitions. A strong increase in fluorescence intensity was also obtained for numerous atomic lines and molecular bands of interest for the developement of high-power, high-efficiency, visible and ultraviolet lasers.
- Publication:
-
Review of Scientific Instruments
- Pub Date:
- April 1979
- DOI:
- 10.1063/1.1135843
- Bibcode:
- 1979RScI...50..421F
- Keywords:
-
- Blowdown Wind Tunnels;
- Electron Guns;
- Electron Pumping;
- Gasdynamic Lasers;
- High Power Lasers;
- Supersonic Flow;
- Cold Cathodes;
- Current Density;
- Electron Transitions;
- Fluorescence;
- Gas Mixtures;
- Gas Temperature;
- High Pressure;
- Low Temperature;
- Time Measurement;
- Xenon Fluoride Lasers;
- Lasers and Masers;
- 85.10.Dt;
- 47.40.Ki;
- 42.60.By;
- Supersonic and hypersonic flows;
- Design of specific laser systems